/Engine/Source/Runtime/Engine/Classes/Kismet/KismetMathLibrary.h
Returns Value mapped from one range into another. (e.g. 20 normalized from the range 10->50 to 20->40 would result in 25)
static double MapRangeUnclamped ( double Value, double InRangeA, double InRangeB, double OutRangeA, double OutRangeB )